Similar to CTK-601/611/631 with 32 registration memories, a real pitch-bend wheel (with a convenient detent halfway up), 6 non-assignable drum pads and a very informative backlit LCD but no "free sessions". I usually play it in Fingered mode, retrieve Split/layer/sostenuto-pedal setups from registration memory and pretend I have 3 hands for a while (Split/layer doesn't work over MIDI-out though).

Most of the GM voices are reasonable - good Grand Piano and Electric Piano 1, even better (although limited to 12-note polyphony) Stereo Piano (#138) and Chorus Electric Piano (#146); Church & Reed organs, Strings 1&2, Bass+Lead and Polysynth for full-keyboard organ/synth work; good fingered & slap Basses (including a crossfade at #135) and excellent solo trumpet & alto/tenor sax. The guitars were mostly more suited to accomp than solo work, and I was disappointed with the Electric Grand, Brass Ensemble and Whistle. Some of the synth tones are good, others very cheesy .... but ANY tone can be modified and saved as a user tone (take a bass sound, add pitch-set 37 and a slow release and Voila: Disco!) - just ensure you have the batteries inserted or take a sysex bulk dump. The 50's - 70's pop/rock styles are rendered very well (now what's that song? #34 is by Deep Purple) but with the 90's dance ones - Rave and Trance excepted - I found myself involuntarily reaching for the mixer to "cut the cheese".

The manual can be hard to fathom and there are a few other traps for the unwary, like one-touch settings not restoring mixer defaults (I keep memory 0A aside for this) and the memories don't store variation. And look out when playing a melody 6th note with a held left-hand chord in Full Range Chord mode - it recognises this as a minor-7th chord unless you move the 3rd note of the root-note-low chord to the right hand or add a (dominant or major) 7th to the 5th-note-low chord inversion. Or you can turn channel 9 off via the mixer and roll-your-own-bassline with the remaining chord notes lightly held into each change (I edited voice 136 to create a fingered-bass/string crossfade).

Overall a good and very flexible attempt by Casio. But don't leave it in the sun otherwise the LCD can fade out permanently!

That's it, now I use it as a MIDI Controller, it worths the price definitely, a great machine for starting...